This android-studio project repo contains a few main android library 'modules' which allows Android phones to connect and read/parse GNSS (GPS/GLONASS/Galileo/BeiDou) position data from existing Bluetooth GNSS Receivers like the EcoDroidGPS Bluetooth GPS Receiver (https://www.clearevo.com/ecodroidgps) - which is the main target device and developed by the same author of this project and also others similar 'nmea-like-messages over RFCOMM' devices like the HOLUX Bluetooth GPS devices, the Garmin GLO, etc.